Placement of virtual content in environments with a plurality of physical participants

ABSTRACT

A device may be configured to determining display properties for virtual content in an environment with a plurality of physical participants by capturing an image of the environment, analyzing the captured image to identify at least one object in the environment, determining a parameter for the identified object, and determining a display property of a digital representation of virtual content based on the determined parameter. Embodiments may include negotiating display properties with other devices to generate coordinated display properties, and rendering the digital representation of the virtual content so that the remote participant appears to be in the same fixed position to all co-located participants and sized consistent with the co-located participants.

BACKGROUND

In recent years, software applications that render images and virtualcontent within an environment have been growing in popularity and thevariety of uses, such as electronic gaming, virtual training systems,collaborative work environments, advanced web-based conferencing andscreen-sharing applications. In addition, advances in mobile devicetechnologies now allow mobile device users to execute powerful softwareapplications on their mobile devices, such as augmented reality softwareapplications that combine real world images from a user's physicalenvironment with computer-generated imagery or virtual content. Forexample, an augmented reality application may add graphics, sounds,and/or haptic feedback to the natural world that surrounds a user of theapplication. Images, video streams and information about people and/orobjects may be presented to the user on a wearable electronic display(e.g., smart glasses, augmented reality glasses, etc.) so that the usercan view and/or interact with representations of the real-world peopleor objects.

Due to these trends, it is expected that augmented reality applicationswill allow users to collaborate and interact with others in remotelocations as if all the participants are located in the same environment(e.g., in the same room). For example, an augmented reality applicationmay render the remote participants as three-dimensional representationsor a two-dimensional video or an avatar so that the local and remoteparticipants may interact and communicate in the same manner as theywould if all the participants were in the same environment.

SUMMARY

Various aspects of the disclosure provide methods of determining displayproperties for virtual content in an environment with a plurality ofparticipants, which may include capturing, by a processor, an image ofthe environment, analyzing the captured image to identify an object inthe environment, determining a parameter for the identified object, anddetermining a display property of a digital representation of virtualcontent based on the determined parameter. In some aspects, theprocessor may be a processor of a smartphone of one of the plurality ofparticipants.

Some aspects may include assigning a priority to the determinedparameter. In some aspects, determining the display property of thedigital representation of the virtual content based on the determinedparameter may include determining the display property of the digitalrepresentation of the virtual content based on the priority assigned tothe determined parameter.

In some aspects, determining the parameter for the identified object mayinclude determining at least one or more of a fixed position parameter,a size parameter, or a line-of-sight parameter, and determining at leastone or more of a field-of-view parameter, a spacing parameter, aninter-person distance parameter, a height parameter, and a visibilityparameter. In some aspects, assigning a priority to the determinedparameter may include assigning a first priority to the fixed positionparameter, the size parameter, or the line-of-sight parameter, andassigning a second priority to the field-of-view parameter, the spacingparameter, the inter-person distance parameter, the height parameter, orthe visibility parameter, in which the first priority is a higherpriority than the second priority.

Some aspects may include identifying one or more other devices in theenvironment, and sending the determined parameters to the identified oneor more other devices. Some aspects may include receiving an additionalparameter from at least one other device in the environment, in whichdetermining the display property of the digital representation of thevirtual content based on the determined parameter may includedetermining one or more display properties of the digital representationof the virtual content based on the determined parameter and thereceived additional parameter.

In some aspects, determining the display property of the digitalrepresentation of the remote participant based on the determinedparameter may include negotiating one or more display properties forrendering the digital representation of the remote participant with atleast one other device in the environment to generate one or morecoordinated display properties. Some aspects may include using the oneor more coordinated display properties to render the digitalrepresentation of the remote participant so that all co-locatedparticipants physically present in the environment perceive the remoteparticipant to be in the same fixed position in the environment. Someaspects may include using the one or more coordinated display propertiesto size the digital representation of the remote participant based on asize of a participant physically present in the environment. Someaspects may include using the one or more coordinated display propertiesto render the digital representation of the remote participant so thatthe remote participant appears to be positioned between a firstparticipant physically present in the environment and a secondparticipant physically present in the environment.

In some aspects, using the one or more coordinated display properties torender the digital representation of the remote participant so that theremote participant appears to be positioned between the firstparticipant physically present in the environment and the secondparticipant physically present in the environment may include using thecoordinated display properties to render the digital representation ofthe remote participant so that the remote participant appears to beapproximately equidistant to the first participant physically present inthe environment and the second participant physically present in theenvironment.

Some aspects may include using the one or more coordinated displayproperties to render the digital representation of the remoteparticipant so that the remote participant appears to be anchored to anempty seat. Some aspects may include capturing an updated image of theenvironment, analyzing the captured updated image to determine whether anumber, location, position, or size of the identified object haschanged, determining an updated parameter for the identified object inresponse to determining that the location, position, or size of theidentified object has changed, determining whether a difference betweenthe determined parameter and the determined updated parameter exceeds athreshold value, and determining an updated display property for thedigital representation of the remote participant in response todetermining that the difference between the determined parameter and thedetermined updated parameter exceeds the threshold value.

In some aspects, determining the display property of the digitalrepresentation of the remote participant based on the determinedparameter may include determining at least one display property for eachdigital representation of each of a plurality of remote participants. Insome aspects, capturing the image of the environment may includecapturing, by a processor associated with a device (e.g., computingdevice, mobile device, head mounted device, etc.), the image of theenvironment. In some aspects, determining the parameter for theidentified object may include determining at least one or more of afixed position parameter, a size parameter, a line-of-sight parameter, afield-of-view parameter, a spacing parameter, an inter-person distanceparameter, a height parameter, or a visibility parameter. In someaspects, the virtual content may be a remote participant. In someaspects, the virtual content is related to a game. In some aspects, theenvironment may be an augmented reality game environment.

Further aspects may include a computing device that is equipped with aprocessor that is configured with processor-executable instructions toperform operations of any of the methods summarized above, such ascapturing an image of an environment, analyzing the captured image toidentify at least one object in the environment, determining a parameterfor the identified object, and determining a display property of adigital representation of a remote participant based on the determinedparameter. Further aspects may include a device that includes an imagesensor, a projector configured to project images onto optical lenses,and a processor coupled to the image sensor and projector, andconfigured with processor-executable instructions to perform operationsof any of the methods summarized above, such as capturing an image of anenvironment, analyzing the captured image to identify at least oneobject in the environment, determining a parameter for the identifiedobject, and determining a display property of a digital representationof a remote participant based on the determined parameter.

Further aspects may include a non-transitory processor-readable storagemedium having stored thereon processor-executable instructionsconfigured to cause a processor in a device and/or in an associatedcomputing device to perform operations of any of the methods summarizedabove. Further aspects may include a device and/or associated computingdevice having various means for accomplishing the functions of themethods summarized above.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are incorporated herein and constitutepart of this specification, illustrate example embodiments of variousembodiments, and together with the general description given above andthe detailed description given below, serve to explain the features ofthe claims.

FIG. 1A is an illustration of a head mounted device (e.g., augmentedreality glasses) that may be configured to implement variousembodiments.

FIG. 1B is a component block diagram of smartphone suitable forimplementing some embodiments.

FIG. 1C is a system block diagram that illustrates the computerarchitecture and sensors that could be included in a device that isconfigured to render a digital representation of a remote participant ina virtual meeting in accordance with the embodiments.

FIG. 2A is an illustration of meeting participants wearing devices thatcould configured to render a digital representation of a remoteparticipant in a virtual meeting in accordance with the embodiments.

FIG. 2B is a block diagram illustrating that the digital representationof the remote participant may be rendered so that the remote participantis within the field-of-view of the co-located participants and does notblock the line-of-sight of any of the remote or co-located participants.

FIGS. 3A and 3B are block diagrams illustrating devices configured torender a digital representation of a remote participant in a virtualmeeting that includes multiple co-located participants that arephysically present in the same environment and sitting around a gametable in positions suitable for viewing a presentation.

FIG. 4A is a block diagram illustrating that a device may render adigital representation of the remote meeting participant at a naturalposition relative to the game table and so that each of the co-locatedparticipants have a direct line-of-sight to the digital representationof the remote meeting participant.

FIG. 4B is a block diagram illustrating that a device configured inaccordance with the embodiments may exchange data with other devicespresent in the environment to relocate the digital representation of theremote meeting participant to a different location or position relativeto the game table so that all of the co-located participants have adirect line-of-sight to each other and to the digital representation ofthe remote meeting participant.

FIGS. 5A-5C are block diagrams illustrating that devices configured inaccordance with the embodiments may intelligently determine thelocations in which the digital representations of the remote meetingparticipants should be rendered relative to the locations or positionsof the co-located participants that are physically present in theenvironment.

FIGS. 6-9 are process flow diagrams illustrating methods of determiningdisplay properties for a digital representation of a remote participantin accordance with some embodiments.

FIG. 10 is a process flow diagram illustrates a method of updating thedisplay properties for a digital representation of a remote participantin accordance with an embodiment.

FIG. 11 is a component diagram of example computing device suitable foruse with the various embodiments.

DETAILED DESCRIPTION

Various embodiments will be described in detail with reference to theaccompanying drawings. Wherever possible, the same reference numberswill be used throughout the drawings to refer to the same or like parts.References made to particular examples and implementations are forillustrative purposes, and are not intended to limit the scope of theclaims.

In overview, the various embodiments include methods, and devices (e.g.,computing device, mobile device, head mounted device, etc.) configuredto implement the methods, for determining display properties for virtualcontent in environments with a plurality of physical participants. Forexample, a mobile device or a head mounted device may be configured tocapture an image of an environment (e.g., game room, meeting area,playing field, etc.), analyze the captured image to identify at leastone object in the environment, determine a parameter for the identifiedobject, and determine a display property of a digital representation ofa remote participant based on the determined parameter.

The term “mobile device” is used herein to refer generally to any one orall of smartphones, cellular telephones, Internet-of-things (IOT)devices, personal or mobile multi-media players, laptop computers,tablet computers, ultrabooks, palm-top computers, wireless electronicmail receivers, multimedia Internet enabled cellular telephones,wireless gaming controllers, head mounted devices, and similarelectronic devices which include a programmable processor, a memory andcircuitry for sending and/or receiving wireless communication signalsto/from wireless communication networks. While the various embodimentsare particularly useful in mobile devices, such as smartphones andtablets, the embodiments are generally useful in any electronic devicethat includes communication circuitry for accessing cellular or wirelesscommunication networks.

The phrase “head mounted device” and its acronym “HMD” may be usedinterchangeably herein to refer to any electronic display system thatpresents the user with a combination of computer-generated imagery andreal-world images from a user's physical environment (i.e., what theuser would see without the glasses) and/or enables the wearer/user toview the generated image in the context of the real-world scene. Asexamples, a head mounted device may be, may include, or may be includedin, a helmet, eyeglasses, virtual reality glasses, augmented realityglasses, electronic goggles, and other similar technologies/devices. Insome embodiments, a head mounted device may include a processor, amemory, a display, a camera, and a wireless interface for connectingwith the Internet, a network, or another computing device.

In some embodiments a head mounted device may be an accessory for and/orreceive video from another computing device (e.g., desktop, laptop,Smartphone, tablet computer, etc.), with all or portions of theprocessing being performed on the processor of the other computingdevice (e.g., the computing devices illustrated in FIGS. 1B and 11,etc.). As such, in various embodiments, the head mounted device may beconfigured to perform all processing locally on the processor in thehead mounted device, offload all of the main processing to a processorin another computing device (e.g. a laptop present in the game room,etc.), or split the main processing operations between the processor inthe head mounted device and the processor in the other computing device.Further, in situations in which there are multiple head mounted devicespresent (e.g., in a meeting with several participants present) and/ormultiple computing devices present (e.g., multiple smartphone, mixturesof smartphones, tablets and laptop computers), main processingoperations may be performed in a distributed manner with the presenthead mounted devices and/or computing devices may exchanging data andcomputational results via wireless communications (e.g., Bluetooth,WiFi, LTE-Direct, etc.)

The term “environment” is used herein to refer generally to a visiblecontext in which participants may appear, in reality and virtually. Anenvironment may include a physical location of the local participants.Non-limiting examples of physical environments include a game room, acontrol room, a classroom, a training facility, a playing field (e.g.,for a game), etc. In some embodiments, an environment may include avirtual location, such as an electronic game domain, in which allparticipants appear virtually. For example, the environment may be thevirtual space within which participants interact in an augmented realityboard game.

The phrases “remote participant” and virtual content are used herein torefer to a person or a digital representation of a person that isprojected to appear in the same virtual environment and who interactswith others but is not physically present in the same physicalenvironment (e.g., same playing field, meeting room, etc.) as the otherparticipants. The phrase “co-located participant” is used herein torefer to a person (or a device held or worn by the person) who isphysically present in the same environment as at least one otherparticipant. In the following descriptions and the claims reference maybe made to “virtual content,” “a remote participant” and “the remoteparticipant,” however such references are for ease of description andthe various embodiments are not limited to rendering a virtual presencefor a single participant. Rather, the methods and operations of thevarious embodiments may be used to position and render any number ofremote participants. Similarly, the various embodiments may work withany number of co-located participants. Further, the various embodimentsmay be implemented in applications in which all participants are remoteparticipants, such as in virtual gaming applications. Further, the“remote participant” may be an image of a virtual participant, such asan avatar, a computer-generated image of a person performing a role in avirtual reality game. To encompass the various types of images ofindividuals not physically present, the term “virtual content” may beused to refer to a virtual participant in the descriptions and theclaims.

People are increasingly using their devices (e.g., smartphones, mobiledevice, head mounted device, etc.) to conduct or interact with other inaugmented reality applications, such as augmented reality games,augmented reality training, virtual meetings, etc. A popular use ofaugmented reality games, which may be played on participants'smartphones, which show images of individual that are not physicallypresent, but appear presented in images on the smartphone as in actualappearance (e.g., as image via a camera on the smartphone) or in avirtual appearance (e.g., an avatar). Also, augmented reality systemsare revolutionizing training of operators of sophisticated equipment,such as complex control rooms, war rooms, aircraft cockpits, roboticsurgery environments, and enabling local and remote individuals toparticipate in the same training sessions can dramatically improve teamtraining efficiency and cost effectiveness. Further, it is no longernecessary for all participants in a meeting to be physically present inorder to interact with others as if all were in the same game room, asaugmented reality systems can be used to present images of allparticipants as if in the same environment.

Smartphones, modern virtual reality displays and image capture devicesmay improve productively and facilitate interactions between the localand remote participants in various types of group engagements (e.g.,augmented reality games, group chats, meetings, group training,lectures, etc.) by rendering digital representations of remoteparticipants in virtual reality displays so that the remote participantsappear to be in the same environment as the user/wearer of the userdevice. Yet, for virtual group engagements (e.g., augmented realitygames, meetings, etc.) in which two or more co-located participants arephysically present in the same environment (e.g., seated before the samephysical gameboard, in the playing field, same room, area, controlcenter, etc.), any improvements in productivity or user-interactionsprovided by the user device (e.g., a smartphone) could be negated if theuser device does not intelligently select the location and/or positionin which the digital representations of virtual content, such as remoteparticipants, are rendered. For example, if the placement of a digitalrepresentation of a remote participant is not consistent in the userdevices (e.g., smartphones) of each of the co-located participants, eachco-located participant may face/look a different direction when talkingor listening to virtual content, such as a remote participant. Thiscould be confusing, distracting, disruptive, and/or otherwise hinder thenatural human-to-human communications between the participants.

Generally, to facilitate natural human-to-human communications, it maybe beneficial for the user devices to place the virtual content (e.g.,digital representations of remote participants, etc.) in a fixedposition that is the same from the perspective of all participants,including co-located participants when some participants are physicallypresent in the same environment. For example, if the digitalrepresentation of virtual content (e.g., a remote participant) is placedin a certain position at a game table by one user device, all of theother user devices of the co-located participants may render the digitalrepresentation of the remote participant in that same position. Inaddition, it may be beneficial for the user devices to intelligentlysize the digital representation of the remote participant so that theremote participant does not appear too big, too small, or otherwiseunnatural to the co-located participants. For example, the digitalrepresentation of the virtual content (e.g., remote participant) may besized to appear to be approximately the same size in smartphone displaysas co-located participants. Further, it may be beneficial for the userdevices to render the digital representation of a remote participant sothat the remote participant is placed at a proper height relative to theco-located participants, is within the field-of-view of the co-locatedparticipants, does not block the line-of-sight of another participant,is appropriately spaced (e.g., all participants appear approximatelyequidistant, etc.), accounts for inter-person distance (e.g., is notrendered so close to another participant so that it feels as though theperson is encroaching on personal space boundaries, etc.), and isotherwise easily visible (e.g., is not placed in front of bright orcomplex background, etc.).

Various embodiments include an augmented reality software applicationconfigured to function in a user device (e.g., a smartphone), and/oruser devices configured to facilitate natural human-to-humancommunications (e.g., for eye contact, normal turn taking, etc.) amonglocal and remote participants and virtual content by intelligentlydetermining the locations, positions, orientations, sizes and otherdisplay characteristics of the virtual content, such as digitalrepresentations of remote participants, to facilitate naturalhuman-to-human communications (e.g., for eye contact, normal turntaking, etc.).

A device processor (e.g., a processor in a smartphone, in a head mounteddevice worn by a co-located participant, in a mobile devicecommutatively coupled to a head mounted device, etc.) may be configuredto collaborate with other device processors (e.g., in smartphones, inhead mounted devices worn by other co-located participants, etc.) tointelligently determine the display properties of a digitalrepresentation of virtual content, such as a remote participant. Forexample, the device processor may be configured to determine anenvironment, such as by rendering a virtual environment (e.g., anaugmented reality gameboard, virtual game environment, etc.) or bycapturing an image of an actual environment (e.g., a game table, aplaying field, conference room, a control room, a training environment,etc.) via a camera of the user device. For actual environments, thedevice processor may analyze the captured image to identify people andobjects (e.g., desk, table, chairs, walls, etc.) within the environment,capture or compute data (e.g., via a sensor array or processor). Forvirtual environments, the device processor may determine shapes andlocations of various virtual objects in the environment. The deviceprocessor may compute various parameters for each of the identifiedobjects based on the captured/computed data, and send the determinedparameters to other device processors (e.g., sending the data viawireless data links to smartphones of other participants).

In some embodiments, the device processor may also be configured to uselocalization and mapping techniques, such as simultaneous localizationand mapping (SLAM), visual simultaneous localization and mapping(VSLAM), and/or other techniques known in the art to create a grid mapof the scene. The device processor may use the grid map to determine theposition of virtual content, such as a remote participant, and/or sharethe grid map with other devices in the environment so that all deviceprocessors know where the virtual content should be placed in theenvironment.

The parameters computed and communicated by the device processor mayinclude a fixed position parameter, a size parameter, a line-of-sightparameter, a field-of-view parameter, a spacing parameter, inter-persondistance parameter, a height parameter, and/or a visibility parameter.Each of these parameters may be associated with one or more weights thatindicate the importance of the parameter. For example, to accommodate amulti-party game with virtual content and many remote participants, adevice processor may increase the weights associated with the fixedposition parameter and/or decrease the weights associated with the sizeparameter. The device processor may also prioritize the parameters,giving a higher priority to the fixed position, size, and line-of-sightparameters than to the field-of-view, spacing, inter-person distance,height, and visibility parameters.

Each device processor may receive parameters computed by the otherdevice processors, and use the received parameters in conjunction withthe parameters computed on the device to coordinate or negotiate displayproperties for rendering the digital representation of virtual content,such as images of a remote participant.

Each device processor may use the coordinated display properties torender the digital representations of virtual content, such as images ofa remote participant so that all the co-located participants (i.e.,people physically present in the same physical environment) perceive thevirtual content to be in the same location in the environment (e.g.,gameboard, game room, game scene, conference room, control room, warroom, equipment, etc.), anchored to the same physical object (e.g., agame piece, an empty chair, a console, etc.), and/or otherwise in afixed position with respect to images of the environment.

The device processors may also be configured to use the coordinateddisplay properties to intelligently size the digital representation sothat virtual content, such as images of a remote participant, does notappear unnatural to the participants when viewed through their devices(e.g., smartphones), so that the virtual content is placed at a properheight relative to the co-located participants, is within thefield-of-view of the co-located participants, does not block theline-of-sight of another participant, is appropriately spaced (e.g., allparticipants appear approximately equidistant, etc.), accounts forinter-person distance (e.g., is not rendered so close to anotherparticipant so that it feels as though the person is encroaching onpersonal space boundaries, etc.), and is otherwise easily visible (e.g.,is not placed in front of bright or complex background, etc.).

In some embodiments, the device processors may be configured toreplicate real-world scenarios, such as by anchoring the digitalrepresentation of virtual content to an empty chair at within a gamescene, behind a physical or virtual console, etc. In an embodiment, thedevice processor may be configured to an select an empty chair (orposition relative to a game table, equipment, etc.) that an individual(when the virtual content is an image of a remote participant) wouldlikely have chosen if he/she was physically present in the environment(e.g., a chair that is not far away from the other participants in agame, an empty console in a control room, etc.).

In some embodiments, the device processors may be configured to detectchanges in the numbers, locations, positions, sizes, etc. of theobjects, virtual content, or people in the environment, determinewhether the detected changes exceed a threshold value, and dynamicallyrecompute the parameters or weights to account for the detected changesin response to determining that the detected changes exceed thethreshold value. For example, a device process (e.g., a processor in asmartphone of a participant) may detect that a new participant (virtual,remote or co-located) has joined the game, meeting, training session,etc. after it has started, and recompute the parameters and/or weightsto account for the new participant, and update the renderings of thevirtual content (e.g., remote participants) based on the recomputedparameters and/or weights. As another example, the device process maydetect that a participant (virtual, remote or co-located) has movedpositions (e.g., moved laterally by changing seats, moved vertically bystanding or sitting, etc.) after the game, meeting or training sessionhas started, determine whether the distance between the participant'scurrent and previous positions exceeds a threshold value, and recomputethe parameters and/or update the renderings of the remote participantsin response to determining that distance between the participant'scurrent and previous positions exceeds a threshold value.

In some embodiments, the device processors may be configured to computeadditional values and perform additional operations to account forspecial considerations associated with updating the renderings of theremote participants or re-positioning the placement of remoteparticipants after the game, meeting or training session has started.

In some embodiments, the device processor may be configured to adjustthe renderings of virtual content, such as images of remote participants(e.g., by re-sizing and re-spacing images of the virtual content) tosupport social conventions and facilitate human-to-human communications.For example, the device processor may be configured to determine thepositioning of virtual content, such as images of virtual or remoteparticipants, similar to how people typically join co-located games,meetings, training sessions, etc. In completely co-located games andmeetings, it is typical for a latecomer to find a seat or a standingposition that is near the rest of the group. It is also common for alatecomer to select a seat or standing position that is approximatelyequal distance from each of the other participants (for example, peoplegenerally won't sit right next to one another if there are other openseats more equally spaced). People do this naturally in part to improveeye contact with the greatest number of participants. A latecomer mayalso squeeze in to a group configuration, and the other participants mayadjust their positions slightly to make space for the latecomer. Toreplicate these human behavior tendencies, the device processor may beconfigured to automatically adjust the positions/renderings of the othervirtual content to maintain a good spacing and/or to account for theother considerations discussed above (e.g., line of sight, etc.).

In some embodiments, the device processor (e.g., a processor of asmartphone) may be configured to set the threshold values high enough sothat the renderings are not adjusted when certain changes are detected,such as when a single participant stands up. The device processor mayset the threshold values low enough so that the renderings are adjustedwhen other changes are detected, such as when a majority of co-locatedpersons stand or sit.

In some embodiments, the device processor may be configured tocommunicate user changes to other device processors for consistentrendering. For example, if a user manually adjusts the location in whicha digital representation of virtual content, such as a remoteparticipant, is rendered on his or her smartphone, the device processormay send the adjusted location of the rendering to the other deviceprocessors, such as processors in smartphones of others engaged in thesame game, meeting, training, etc. In response, the other deviceprocessors may also adjust the digital representation of the samevirtual content so that the configuration of virtual content withrespect to the environment remains consistent for all users.

FIG. 1A illustrates a user device in the form of a head mounted device100 that may be configured to intelligently determine the displaycharacteristics of a virtual object (e.g., digital representation of aremote participant) in accordance with the various embodiments. In theexample illustrated in FIG. 1A, the head mounted device 100 includes aframe 102, two optical lenses 106, and a processor 114 that iscommunicatively coupled to an image projector 108, a monocular imagesensor or cameras 110, a sensor array 112, a memory 116, andcommunication circuitry 118. The projector 108 may be embedded in armportions 104 of the frame 102 and configured to project images onto theoptical lenses 106. The projector 108 may include a light-emitting diode(LED) module, a light tunnel, a homogenizing lens, an optical display, afold mirror, and other components well known in prior art projectors orhead mounted displays. In some embodiments, the two optical lenses 106may include image forming elements configured to superimpose an image onviews through the lenses, in which case a projector 108 may not beimplemented.

In some embodiments, the head mounted device 100 and/or the processor114 may be configured to employ SLAM techniques to construct and updatea map of an unknown environment while simultaneously keeping track ofthe head mounted device's 100 location within the environment. Forexample, a head mounted device 100 may be equipped with a monocularimage sensor that captures images or frames from the environment. Thehead mounted device 100 may identify prominent objects (e.g., co-locatedparticipants) or features (e.g., facial and/or body features ofco-located participants) within the captured image, estimate thedimensions and scale of the features in the image, compare theidentified features to each other and/or to features in test imageshaving known dimensions and scale, and identify correspondences based onthe comparisons. Each correspondence may be a value set or aninformation structure that identifies a feature (or feature point) inone image as having a high probability of being the same feature inanother image. Said another way, a correspondence may be a set of imagepoints (e.g., a first point in a first image and a second point in asecond image, etc.) that are in correspondence. The head mounted device100 may produce a homography matrix information structure based on theidentified correspondences, and use the homography matrix to determineits pose (e.g., position, orientation, etc.) within the environment.

Various embodiments may be implemented a smartphone, an example of whichis illustrated in FIG. 1B. A smartphone 120 may include a processor 121coupled to internal memory 122, a display 123, and to a speaker 124.Additionally, the smartphone 120 may include an antenna 125 for sendingand receiving electromagnetic radiation that may be connected to awireless data link and/or cellular telephone transceiver 126 coupled tothe processor 121. Smartphones 120 typically also include menu selectionbuttons or rocker switches 127 for receiving user inputs.

A typical smartphone 120 also includes a sound encoding/decoding (CODEC)circuit 128, which digitizes sound received from a microphone into datapackets suitable for wireless transmission and decodes received sounddata packets to generate analog signals that are provided to the speakerto generate sound. Also, one or more of the processor 121, wirelesstransceiver 126 and CODEC 128 may include a digital signal processor(DSP) circuit (not shown separately).

FIG. 1C illustrates a computer architecture and various sensors that maybe included in a head mounted device 100 or smartphone 120 that isconfigured to employ SLAM or other techniques to render a digitalrepresentation of a remote participant in a virtual meeting inaccordance with the various embodiments. In the example illustrated inFIG. 1C, the head mounted device 100 includes a main board component152, an image sensor 154, a microcontroller unit (MCU) 156, an infrared(IR) sensor 158, an inertial measurement unit (IMU) 160, a laserdistance sensor (LDS) 162, and an optical flow sensor 164.

The sensors 154, 158-164 may gather information that is useful foremploying SLAM techniques in a head mounted device 100 or smartphone120. For example, the optical flow sensor 164 may measure optical flowor visual motion, and output measurements based on the opticalflow/visual motion. An optical flow may identify or define the patternof apparent motion of objects, surfaces, and edges in a visual scenecaused by the relative motion between an observer (e.g., head mounteddevice 100, smartphone 120, wearer/user, etc.) and a scene. The opticalflow information may be used by the MCU 156 to measure visual motion orrelative motion between the head mounted device 100, smartphone 120 andother objects in the vicinity of the head mounted device 100, smartphone120, etc. In addition, the head mounted device 100 or smartphone 120 mayuse the optical flow information for motion detection, objectsegmentation, time-to-contact information, focus of expansioncalculations, motion compensated encoding, stereo disparitymeasurements, and other similar information. In some embodiments, theoptical flow sensor 164 may be an image sensor that is coupled to theMCU 156 (or processor 114, 121) that is programmed to run an opticalflow algorithm. In some embodiments, the optical flow sensor 164 may bevision chip that includes the image sensor and processor on the samechip or die.

The head mounted device 100 or smartphone 120 may be equipped with avariety of additional sensors, including a gyroscope, accelerometers, amagnetometer, a magnetic compass, an altimeter, a camera, an opticalreader, an orientation sensor, a monocular image sensor, and/or similarsensors for monitoring physical conditions (e.g., location, motion,acceleration, orientation, altitude, etc.) or gathering information thatis useful for employing SLAM techniques.

In the following descriptions of various embodiments, the figures andthe descriptions of the figures refer to an example implementation ofvarious embodiments in which local and remote participants are meetingaround a game table, such as a table on which a real and virtualgameboard is presented in an augmented reality game. This example is forillustration purposes and is not intended to be limiting. Variousembodiments are equally applicable to other applications in whichvirtual reality is used to enable local and remote participants, as wellas virtual content, to interact as if physically located in the sameenvironment, such as games involving a common game environment (e.g.,gameboard, game scene, etc.), a conference table for a meeting, anequipment control panel for training sessions involving equipment, whichmay be physically present or rendered virtually, training sessions amongteams of decision makers, meetings in control rooms or war rooms, etc.

FIG. 2A illustrates that head mounted devices 100 a, 100 b configured inaccordance with the various embodiments may be used to conduct a gamewith virtual content, such as a remote participant 202. A deviceprocessor (e.g., a processor 121 in a participant's smartphone 200 a, aprocessor 114 in a head mounted device 100 a, etc.) may be configured tocollaborate with other device processors (e.g., a processor 121 in aparticipant's smartphone 200 b, processor 114 in a head mounted device100 b) to intelligently determine the display properties of a digitalrepresentation of virtual content, such as a remote participant 202. Forexample, the device processor may be configured to capture an image ofan environment (e.g., game room) via a camera of a smartphone or headmounted device, analyze the captured image to identify people andobjects (e.g., game table 206, a gameboard 207, co-located participants204 a and 204 b, etc.) within the environment, capture or compute data(e.g., via cameras and other sensors of a smartphone 200 a, via a sensorarray 112 or processor 114 of the head mounted device 100 a, etc.),compute various parameters for each of the identified objects based onthe captured/computed data, and send the computed/determined parametersto the other device processors (e.g., a processor 121 within anothersmartphone 200 b). The device processors may use the parameters todetermine various display properties and render the digitalrepresentation of virtual content, such as a remote participant 202, sothat the virtual content is placed at a game table 206 and appears toeach co-located participant 204 a, 204 b to be in within a fixed area208, such as with respect to a real or virtual gameboard 207.

FIG. 2A also illustrates that the smartphones 200 a, 200 b and/or headmounted devices 100 a, 100 b may be configured to size the digitalrepresentation of virtual content, such as a remote participant 202, sothat the remote participant does not appear too big, too small, orotherwise unnatural to the co-located participants 204 a, 204 b. Thesmartphones 200 a, 200 b and/or head mounted devices 100 a, 100 b mayalso render the digital representation of virtual content, such as aremote participant 202, so that the virtual content appears to be placedat a proper height 210 relative to the co-located participants 204 a,204 b, is appropriately spaced (e.g., all participants appearapproximately equidistant, etc.), accounts for inter-person distance(e.g., is not rendered so close to another participant so that it feelsas though the person is encroaching on personal space boundaries, etc.),and is otherwise easily visible (e.g., is not placed in front of brightor complex background, etc.).

FIG. 2B illustrates that the digital representation of virtual content,such as a remote participant 202, may be rendered so that the virtualcontent is within the field-of-view of the co-located participants 204a, 204 b viewed through their smartphone display or head mounted devicesand does not to block the line-of-sight of any of remote or co-locatedparticipants.

FIGS. 3A and 3B illustrate multiple meeting participants that areco-located in the same environment (e.g., game room), sitting around agame table 206, and wearing head mounted devices 100 a-100 d.

With reference to FIG. 3A, the co-located participants 304 a-304 d haveselected their seats and/or have arranged themselves around three sidesof the game table 206 so that they can communicate with one another andview a gameboard, whiteboard, TV, monitor, or presentation 302. Each ofthe co-located participants 304 a-304 d is in a slightly differentphysical location relative to the environment and game table 206, andthere is a person-sized gap 306 between two co-located participant 304 band co-located participant 304 c.

With reference to FIG. 3B, the smartphones 200 a, 200 b and/or headmounted devices 100 a-100 d may be configured to communicate with oneanother to collaboratively determine that the digital representation ofvirtual content, such as a remote participant 202, should be rendered inthe person-sized gap 306. As part of these operations, the smartphones200 a, 200 b and/or head mounted devices 100 a-100 d may analyze,compute, or account for various parameters (and their respectiveweights), including a fixed position parameter, a size parameter, aline-of-sight parameter, a field-of-view parameter, a spacing parameter,inter-person distance parameter, a height parameter, and a visibilityparameter.

The fixed position parameter may indicate that the digitalrepresentation of virtual content, such as a remote participant 202,should be placed in a fixed position that is the same with respect toall the co-located participants 304 a-304 d. For example, if the digitalrepresentation of virtual content, such as a remote participant 202, isplaced in front of a certain position at the game table 206, allco-located participants may see the virtual content in that sameposition or within a fixed area. A weight value associated with thefixed position parameter may indicate the weight or importance of therendering of the digital representation of the virtual content in afixed position relative to the other parameters.

The size parameter(s) may indicate that the rendered size of the digitalrepresentation of virtual content, such as a remote participant 202,should be consistent for all co-located participants 304 a-304 d, andshould be appropriate (e.g., a natural and expected size) for theposition in which it is rendered. For example, the size parameter mayindicate that virtual content that is a remote participant's body shouldbe rendered to approximately the same size as the bodies of theco-located participants 304 a-304 d. To accomplish this, one or more ofthe smartphones 200 a, 200 b and/or head mounted displays 100 a-100 dmay be configured to measure the sizes of the heads of the co-locatedparticipants 304 a-304 d and/or the distances between them, generateaverages, and use this information to determine the render size in whichthe digital representation of virtual content, such as a remoteparticipant 202. A weight value associated with each size parameter mayindicate the weight or importance of the rendering the digitalrepresentation of virtual content, such as a remote participant 202,consistent for all co-located participants and/or approximately the samesize as the co-located participants 304 a-304 d.

The line-of-sight parameter(s) may indicate that the digitalrepresentation of virtual content, such as a remote participant 202,should not be rendered in a position that blocks the line-of-sight ofany of the co-located participants 304 a-304 d, which may be determinedby the smartphones 200 a, 200 b and/or head mounted devices 100 a-100 didentifying the regions that block some or all of the view of anotherparticipant. In some embodiments, one or more of the smartphones 200 a,200 b and/or head mounted devices 100 a-100 d may be configured tomeasure the regions and/or lines-of-sight broadly so that the digitalrepresentation of virtual content, such as a remote participant 202, isnot placed too close to an adjacent participant (e.g., co-locatedparticipant 304 b or co-located participant 304 c). A weight valueassociated with each line-of-sight parameter may indicate the weight orimportance of the rendering the digital representation of virtualcontent, such as a remote participant 202, to not block theline-of-sight of any of the co-located participants 304 a-304 d.

The field-of-view parameter(s) may indicate that the digitalrepresentation of virtual content, such as a remote participant 202.should be rendered in a way that fits into the field-of-view of as manyco-located participants 304 a-304 d as possible. A weight valueassociated with each field-of-view parameter may indicate the weight orimportance of the rendering of the digital representation of virtualcontent, such as a remote participant 202, to fit into the field-of-viewof another co-located participant 304 a-304 d. Because smartphones 200a, 200 b and/or head mounted displays 100 a-d may have a narrowfield-of-view, it may be difficult to render the virtual content, suchas a remote person, within the field-of-view of all co-locatedparticipants 304 a-304 d. In this case, the weighting of one or more ofthe field-of-view parameter(s) may be reduced to account for thecharacteristics of the individual smartphones 200 a, 200 b and/or headmounted devices 100 a-100 d and/or any difficulties associated withrender the digital representation of the virtual content, such as aremote participant 202, within the field-of-view of all co-locatedparticipants 304 a-304 d.

The spacing parameter(s) may indicate that the digital representation ofvirtual content, such as a remote participant 202, should be placedequidistance from the co-located participants 304 a-304 d, similar tohow people would normally organize themselves in a face-to-face gamesetting. For example, a person would typically not sit too close toanother person and would not sit too far away from the rest of thegroup. To account for this, the smartphones 200 a, 200 b and/or headmounted displays 100 a-100 d may measure the distances between each ofthe other participants, account for obstacles and objects (e.g.,presentation 302) in the environment, and render the digitalrepresentation of the remote participant 202 on an acceptable side(e.g., side that does not include the presentation 302) that has themost space available. The smartphones 200 a, 200 b and/or head mounteddisplays 100 a-100 d may take measurements, compute an average score,use the average score to determine the longest side, and place thedigital representation of the remote participant 202 on the longestside. This process may be repeated for subsequent remote participants,factoring in the previously positioned virtual content, such as remoteparticipants. Weight values associated with each spacing parameter mayindicate the weight or importance of the rendering the digitalrepresentation of virtual content, such as a remote participant 202,equidistance from the co-located participants 304 a-304 d.

The inter-person distance parameter(s) may indicate that the digitalrepresentation of virtual content, such as a remote participant 202,should not be rendered so close to another participant (e.g., theco-located participant 304 b) so that it feels as though the remoteparticipant is encroaching on personal space boundaries. Since thisinter-person distance may vary from culture to culture, the smartphones200 a, 200 b and/or head mounted displays 100 a-d may be configured todetermine the distance based on preconfigured values, the behaviors anddistances between the co-located participants, artificial intelligence,or other similar parameters. A weight value associated with theinter-person distance parameter may indicate the weight or importance ofthe rendering the digital representation of virtual content, such as aremote participant 202, so that the remote participant does not appearto encroach upon the personal space boundaries of the co-locatedparticipants 304 a-304 d.

The height parameter(s) may indicate that the digital representation ofvirtual content, such as a remote participant 202. should be placed atthe proper height, given the locations, positions and heights of theco-located participants 304 a-304 d. This may entail sitting or standingheight, depending on the locations, positions and heights of theco-located participants 304 a-304 d. In some embodiments, thesmartphones 200 a, 200 b and/or head mounted devices 100 a-d may beconfigured to determine height as the average head or eye height of eachco-located participant. In some embodiments, the smartphones 200 a, 200b and/or head mounted devices 100 a-d may be configured to determinewhether the majority of co-located participants 304 a-304 d are sittingor standing and take the average of whichever is the majority. Forexample, if three co-located participants are sitting and two co-locatedparticipants are standing, the smartphones 200 a, 200 b and/or headmounted devices 100 a-d may take the average eye height of the threeseated participants and place the digital representation of virtualcontent, such as a remote participant 202, at that level. A weight valueassociated with each height parameter may indicate the weight orimportance of the rendering the digital representation of virtualcontent, such as a remote participant 202, the proper height relative tothe other parameters.

The visibility parameter(s) may indicate that the digital representationof virtual content, such as a remote participant 202, should be placedto optimize for visibility, such as by avoiding bright or complexbackgrounds or anchor objects that could hinder the visibility of thedigital representation of virtual content, such as a remote participant202, or interfere with the view of the co-located participants 304 a-304d. A weight value associated with each visibility parameter may indicatethe weight or importance of the rendering the digital representation tooptimize for visibility.

Returning to the example illustrated in FIG. 3B, the smartphones 200 a,200 b and/or head mounted devices 100 a-d may determine that digitalrepresentation of virtual content, such as a remote participant 202,should be rendered in the person-sized gap 306 by capturing andanalyzing images of the environment to identify people and objects inthe environment, including the game participants, the game table 206,and/or the presentation 302. The head mounted devices 100 a-d maycompute various parameters (e.g., depth, distance, orientation, etc.)for the identified objects/people in the environment. The smartphones200 a, 200 b and/or head mounted devices 100 a-100 d may use thecomputed/analyzed parameters to determine that the digitalrepresentation of the remote participant 202 should be rendered in theperson-sized gap 306. That is, the smartphones 200 a, 200 b and/or headmounted devices 100 a-100 d may determine, based on the analysis of oneor more of the above-parameters and their respective weights, thatpositioning the digital representation of virtual content, such as aremote participant 202, in the person-sized gap 306 will allow theco-located participants 304 a-304 d to continue to view the presentation302 and communicate with one another.

In response to determining that the digital representation of virtualcontent, such as a remote participant 202, should be rendered in theperson-sized gap 306, the smartphones 200 a, 200 b and/or head mounteddevices 100 a-100 d may search the captured images of the environment toidentify a surface or object (e.g., empty chair) that is inside or inclose proximity to the person-sized gap 306, select an identifiedsurface/object for use as an anchor, and determine display properties(e.g., size, etc.) for the digital representation of virtual content,such as a remote participant 202, based on computed/analyzed parametersand relative distances between the selected surface/object and theco-located participants 304 a-304 d. The smartphones 200 a, 200 b and/orhead mounted devices 100 a-100 d may render the digital representationof virtual content, such as a remote participant 202, so that thevirtual content appears in a fixed position (e.g., anchored to theanchor surface/object) to all co-located participants and/or so that theco-located participants can readily and naturally communicate andinteract with each other and the virtual content.

FIG. 4A illustrates an example in which the digital representation ofvirtual content, such as a remote participant 202, is placed at anatural position relative to the game table 206, and each of theco-located participants 204 a-204 c have a direct line-of-sight(indicated by the dashed arrows) to the digital representation of thevirtual content. However, the location/position of the digitalrepresentation of virtual content, such as a remote participant 202,blocks the line-of-sight of co-located participants 204 b and 204 c.This could occur if, for example, co-located participant 204 c joins thegame after the game is underway.

FIG. 4B illustrates that the participant smartphones and/or head mounteddevices configured in accordance with the embodiment may collaborate todetermine that the line-of-sight between co-located participants 204 band 204 c is blocked, and relocate the digital representation of virtualcontent, such as a remote participant 202, to a different location orposition relative to the game table 206 so that all of the co-locatedparticipants 204 a-204 c have a direct line-of-sight to each other(indicated by the solid arrows) and a direct line-of-sight to thedigital representation of virtual content, such as a remote participant202 (indicated by the dashed arrows).

FIGS. 5A-5C illustrate that participant smartphones and/or head mounteddevices configured in accordance with the embodiments may intelligentlydetermine the locations in which the digital representations of virtualcontent, such as remote participants 202 a, 202 b, should be renderedrelative to the locations or positions of the co-located participants204 a-204 c. FIG. 5A illustrates that the participant smartphones and/orhead mounted devices may be configured to compute the distances betweenthe co-located participants 204 a-204 c, and determine that the largestdistance (L) between participants is between co-located participant 204a and co-located participant 204 c.

With reference FIG. 5B, the participant smartphones and/or head mounteddevices may render the digital representation of virtual content, suchas a first remote participant 202 a, in-between co-located participant204 a and co-located participant 204 c. The smartphones and/or headmounted devices may recompute the distances between the co-locatedparticipants 204 a-204 c and the digital representation of virtualcontent, such as a remote participant 202 a, and determine that thelargest distance (L) between participants is now between co-locatedparticipant 204 a and co-located participant 204 b.

FIG. 5C illustrates that the participant smartphones and/or head mounteddevices may render the digital representation of virtual content, suchas a second remote participant 202 b, in-between co-located participant204 a and co-located participant 204 b. The participant smartphonesand/or head mounted device may recompute the distances between theco-located participants 204 a-204 c and the digital representations ofvirtual content, such as remote participants 202 a, 202 b, and determinethat the largest distance (L) between participants is now betweenco-located participant 204 b and co-located participant 204 c. Thesmartphones and/or head mounted devices may repeat these operationsuntil all of the remote participants are rendered in the environment.

FIGS. 6-9 illustrate methods 600, 700, 800, 900 of determining displayproperties for a digital representation of virtual content, such as aremote participant, in accordance with various embodiments (e.g.,including any or all of the embodiments discussed above with referenceto FIGS. 1-5). All or portions of the methods 600, 700, 800, 900 may beperformed by a device processor, such as a processor (e.g., processor114 illustrated in FIG. 1A) in a head mounted device worn by aco-located participant, a processor (e.g., processor 121 illustrated inFIG. 1B) in a smartphone, either independently or commutatively coupledto a head mounted device worn by a co-located participant, a processorin a server computing device commutatively coupled to the smartphone orhead mounted device, or a processor associated a cloud network or acloud-based computing system.

Referring to FIG. 6, in block 602 of method 600, the device processormay capture, generate or receive an image of an environment. Forexample, a camera on a smartphone or head mounted device may capturevideo of the environment and provide image frames to the deviceprocessor. As another example, images from the environment may becaptured by one or more cameras positioned within the environment and incommunication with the device processor.

In block 604, the device processor may analyze the captured image toidentify at least one object (e.g., a person, a game table, an emptyseat, etc.) in the environment. In some embodiments, as part of theoperations in block 604, the device processor may to use localizationand mapping techniques, such as machine vision, VSLAM, or othertechnologies and techniques known in the art, to create a grid or map ofthe environment, identify the object, determine the object's location,orientation and/or position in the environment, and/or to perform othersimilar operations.

In block 606, the device processor may determine a parameter for theidentified object. For example, the device process may determine any orall of a fixed position parameter, a size parameter, a line-of-sightparameter, a field-of-view parameter, a spacing parameter, aninter-person distance parameter, a height parameter, and/or a visibilityparameter in block 606. In some embodiments, each of the determinedparameters may be associated with one or more weights or priorities thatindicate the respective importance.

In some embodiments, the device processor may be configured to adjustthe priorities or weights associated with the parameters based on userinputs and/or to account for various conditions, events or preferences.For example, the device processor may determine that rending a digitalrepresentation of virtual content, such as a remote participant, indifferent positions for different co-located participants is moredistracting or disruptive to human-to-human communications andinteractions than rendering a digital representation of virtual content,such as a remote participant, much smaller than the sizes of theco-located participants that are physically present in the environment.As such, to accommodate a game or meeting with many remote participants,the device processor may increase the weights associated with the fixedposition parameter or decrease the weights associated with the sizeparameter. As another example, the device processor may determine thatrending a digital representation of virtual content, such as a remoteparticipant, in different positions for different co-locatedparticipants is more distracting or disruptive to human-to-humancommunications and interactions than rendering a digital representationof virtual content, such as a remote participant, too close to theco-located participants physically present in the environment. Inresponse, the device processor may assign a higher priority or weight tothe fixed position parameter than the priority/weight assigned to theinter-person distance parameter.

In some embodiments, the device processor may be configured to adjustthe priorities or weights associated with the parameters based on userinputs. In such embodiments, the device processor may allow theuser/wearer to manually control the degree to which various parametersare important to that user or to a group or users (e.g., gameparticipants, etc.). In some embodiments, the device processor mayreceive user inputs in the form of user selections made in a settingsmenu of a user interface of a smartphone, head mounted display and/or anassociated computing device.

In some embodiments, the device processor may assign a higher priorityor weight to the fixed position parameter, the size parameter, or theline-of-sight parameter than the priorities/weights assigned to thefield-of-view parameter, the spacing parameter, the inter-persondistance parameter, the height parameter, and the visibility parameter.

Returning to FIG. 6, the device processor may determine a displayproperty of the digital representation of virtual content, such as aremote participant, based on the determined parameters (and theirrespective weights/priorities) in block 608. For example, the deviceprocess may determine, based on the parameters determined in block 608,that the digital representation of virtual content, such as a remoteparticipant, should be rendered in an area encompassed by an empty space(e.g., empty chair, etc.) present in the environment. As anotherexample, the device process may determine, based on the parametersdetermined in block 608, that the digital representation of the virtualcontent, such as a remote participant, should be sized so that thevirtual content appears to the user/wearer to be approximately 6 feettall, with a head size of between 6 to 7 inches wide and 8 to 9 incheslong, a chest circumference between 44 and 46 inches, and a shoulderwidth of 16 inches.

Referring to FIG. 7, in blocks 602-608 of the method 700 the deviceprocessor may perform operations of the like numbered blocks of themethod 600 as described with reference to FIG. 6.

in block 710, the device processor may identify other devices (e.g.,other smartphones, a computing device, mobile device, head mounteddevice, etc.) that are in close physical proximity (e.g., in the sameenvironment, area, game room, etc.) to the device processor. This may beaccomplished by, for example, broadcasting a ping message ortransmitting a beacon requesting that all devices that receive themessage/beacon respond with an identifier (e.g., a media access control(MAC) address, etc.), communication parameters, location information,and/or other similar information.

In block 712, the device processor may send the parameters determined inblock 606 and/or the display properties determined in block 608 to theidentified devices (i.e., the other devices in the same environment,etc.).

Referring to FIG. 8, in blocks 602-606 of the method 800 the deviceprocessor may perform operations of the like numbered blocks of themethod 600 as described with reference to FIG. 6.

In block 808, the device processor may receive additional parametersfrom one or more other devices that are in close physical proximity(e.g., in the same environment) to the device processor. For example, aseach device processor determines parameters, such parameters may betransmitted to all other device processors within the environment. Asanother example, if a single device processor is performing operationsof various embodiments for all devices in the environment, eachsmartphone or head mounted device may send images, location,orientation, and other information to that one processing device.

In block 810, the device processor may determine the display propertiesfor the digital representation of virtual content, such as a remoteparticipant, based on the determined parameters and the additionalparameters received from the other devices.

In block 812, the device processor may send the display propertiesdetermined in block 810 to the identified devices (i.e., the otherdevices in the same environment, etc.).

Referring to FIG. 9, in blocks 602-606 of the method 900 the deviceprocessor may perform operations of the like numbered blocks of themethod 600 as described with reference to FIG. 6.

In block 908, the device processor may negotiate display properties forrendering the digital representation of virtual content, such as aremote participant, with other devices in the environment (or in closephysical proximity to the participants smartphones, head mounted device,etc.) to generate coordinated display properties. For example, thedevice processor may send proposed display properties to the otherdevices and receive from each device their own proposed displayproperties. Various decision methods may be employed by one, some or alldevice processors among the devices to arrive at a single set of displayproperties. For example, each device processor may test each receivedset of display properties and send to the other devices an indication ofwhether any of the various criteria for determining display propertiesis violated. As another example, one device processor within theenvironment may be designated as the controller for determining displayproperties, and may do so based on inputs (e.g., position andorientation information and images capture by other head mounteddisplays) and use the collected information to determine the coordinateddisplay properties. Other methods may be used in determining coordinateddisplay properties.

In block 910, the device processor may render the digital representationof virtual content, such as a remote participant, based on thecoordinated display properties. For example, the device processor mayuse the coordinated display properties to render the digitalrepresentation of the virtual content, such as a remote participant, ina fixed position that is the same with respect to all the co-locatedparticipants. That is, because the display properties are negotiated andcoordinated, if the digital representation of virtual content, such as aremote participant, is placed in a certain position at a game table inanother smartphone or head mounted device in the environment, the deviceprocessor will render the digital representation of virtual content,such as a remote participant, in that same position.

FIG. 10 illustrates a method 1000 of updating the display properties fora digital representation of virtual content, such as a remoteparticipant, in accordance with an embodiment. The method 1000 mayperformed after the display properties of the digital representation aredetermined, the digital representation is rendered, or the virtual gamehas begun. All or portions of the method 1000 may be performed by adevice processor, such as a processor (e.g., processor 114 illustratedin FIG. 1A) in a head mounted device worn by a co-located participant ora smartphone (e.g., processor 121 illustrated in FIG. 11).

In block 1002, the device processor may capture, generate or receive anupdated image of the environment. For example, a camera on one or all ofthe devices may capture video of the environment and periodicallyprovide image frames to the device processor (e.g., a smartphoneprocessor, a processor of the head mounted device, a processor of aremote computing device, etc.). As another example, images of theenvironment may be captured periodically by one or more cameraspositioned within the environment and in communication with the deviceprocessor.

In block 1004, the device processor may analyze the updated image todetermine whether the number, location, position, or size of the peopleor objects in the environment has changed. Such operations may includedetermining boundaries of various participants and objects and comparingthe determined boundaries to boundaries that were determined and storedin memory the last time that the display parameters were determined.

In block 1006, the device processor may determine updated parameters forthe identified object in the environment in response to determining thatthe location, position, or size of the people or objects in theenvironment has changed.

In block 1008, the device processor may determine the difference betweenthe original parameters and the updated parameters.

In determination block 1010, the device process may determine whetherthe difference between the original parameters and the updatedparameters exceeds a threshold value. The threshold value may be sethigh enough so that the renderings are not adjusted when certain changesare detected, such as when a single participant stands up.Alternatively, or in addition, the threshold value may be set low enoughso that the renderings are adjusted when certain changes are detected,such as when a majority of co-located persons stand or sit.

In response to determining that the difference between the originalparameters and the updated parameters does not exceed the thresholdvalue (i.e., determination block 1010=“No”), the device processor maycontinue to render the digital representation of virtual content, suchas a remote participant, based on the original parameters (e.g.,parameters computed in block 606, etc.) and/or the original displayproperties (e.g., display properties computed in block 608, etc.) inblock 1012.

In response to determining that the difference between the originalparameters and the updated parameters exceeds the threshold value (i.e.,determination block 1010=“Yes”), the device processor may determineupdated display properties for the digital representation based on theupdated parameters in block 1014. For example, the device processor mayperform one or more of the operations of any of methods 600, 700, 800 or900 to determine the updated parameters in block 1014.

In block 1016, the device processor may render the digitalrepresentation of virtual content, such as a remote participant, basedon the updated display properties.

Some embodiments may include methods of determining display propertiesfor displaying images of one or more remote participants in a game,augmented reality game, training session, meeting, etc., such as in avirtual reality system by capturing (by a processor associated with asmartphone and/or head mounted device) an image of a game room/area,analyzing the captured image to identify people and objects in the gameroom/area, determining parameters for the identified people and objects,and determining display properties of a digital representation ofvirtual content, such as a remote participant, based on the determinedparameters.

In some embodiments, determining the parameters for the identifiedpeople and objects may include determining the parameters based on oneor more factors, in which the one or more factors include at least oneor more of a fixed position factor, a size factor, a line-of-sightfactor, a field-of-view factor, a spacing factor, an inter-persondistance factor, a height factor, or a visibility factor.

Some embodiments may include assigning a priority to each of the one ormore factors, in which determining display properties of the digitalrepresentation of the remote participant based on the determinedparameters may include determining display properties of the digitalrepresentation of the remote participant based on priorities assigned toeach of the one or more factors, and assigning a priority to each of theone or more factors may include assigning a higher priority to the fixedposition factor, the size factor, or the line-of-sight factor than thepriorities assigned to the field-of-view factor, the spacing factor, theinter-person distance factor, the height factor, and the visibilityfactor.

Some embodiments may include identifying other head mounted devices inthe game room/area, and sending the determined parameters to the othersmartphones and/or head mounted devices in the game room/area. Someembodiments may include receiving additional parameters from othersmartphone and/or head mounted devices in the game room/area, in whichdetermining display properties of the digital representation of thevirtual content, such as a remote participant, based on the determinedparameters may include determining display properties of the digitalrepresentation of the virtual content, such as a remote participant,based on the determined parameters and the additional parametersreceived from the other smartphones and/or head mounted devices in thegame room/area. In some embodiments, determining display properties ofthe digital representation of the virtual content, such as a remoteparticipant, based on the determined parameters may include negotiatingthe display properties for rendering the digital representation of thevirtual content with other smartphones and/or head mounted devices inthe game room/area to generate coordinated display properties.

Some embodiments may include using the coordinated display properties torender the digital representation of the virtual content, such as aremote participant, so that all co-located participants physicallypresent in the game room/area perceive the virtual content to be in thesame fixed position in the game room/area. Some embodiments may includeusing the coordinated display properties to intelligently size thedigital representation of the remote participant so that the remoteparticipant appears to be approximately the same size as co-locatedparticipants physically present in the game room/area. Some embodimentsmay include using the coordinated display properties to render thedigital representation of the virtual content, such as a remoteparticipant, so that the virtual content appears to be approximately thesame height as an average height of co-located participants physicallypresent in the game room/area.

Some embodiments may include using the coordinated display properties torender the digital representation of the virtual content, such as aremote participant, so that the virtual content appears to beapproximately equidistant to co-located participants physically presentin the game room/area. Some embodiments may include using thecoordinated display properties to render the digital representation ofthe virtual content, such as a remote participant so that the virtualcontent appears to be anchored to an empty chair at a game table.

Some embodiments may include capturing an updated image of the gameroom/area, analyzing the captured updated image to determine whether thenumber, location, position, or size of the people or objects in the gameroom/area has changed, determining updated parameters for the identifiedpeople and objects in the game room/area in response to determining thatthe location, position, or size of the people or objects in the gameroom/area has changed, determining whether a difference between thedetermined parameters and the determined updated parameters exceeds athreshold value, and determining updated display properties for thedigital representation of the virtual content, such as a remoteparticipant, in response to determining that the difference between thedetermined parameters and the determined updated parameters exceeds thethreshold value.

Various embodiment methods may be implemented in a variety of personalcomputing devices, such as a laptop computer 1100 as illustrated in FIG.11. A laptop computer 1100 will typically include a processor 1101coupled to volatile memory 1102, and a large capacity nonvolatilememory, such as a disk drive 1104 of Flash memory. The laptop computer1100 may also include a floppy disc drive 1105 coupled to the processor1106. The computer receiver device 1100 may also include a number ofconnector ports or other network interfaces coupled to the processor1101 for establishing data connections or receiving external memoryreceiver devices, such as a Universal Serial Bus (USB) or FireWire®connector sockets, or other network connection circuits for coupling theprocessor 1101 to a network (e.g., a communications network). In anotebook configuration, the computer housing includes the touchpad 1110,the keyboard 1112, and the display 1114 all coupled to the processor1101. Other configurations of computing devices may include a computermouse or trackball coupled to the processor (e.g., via a USB input) asare well known, which may also be used in conjunction with variousembodiments.

The processors may be any programmable microprocessor, microcomputer ormultiple processor chip or chips that may be configured by softwareinstructions (applications) to perform a variety of functions, includingthe functions of the various embodiments described in this application.In some mobile devices, multiple processors may be provided, such as oneprocessor dedicated to wireless communication functions and oneprocessor dedicated to running other applications. Typically, softwareapplications may be stored in the internal memory before they areaccessed and loaded into the processor. The processor may includeinternal memory sufficient to store the application softwareinstructions.

Various embodiments illustrated and described are provided merely asexamples to illustrate various features of the claims. However, featuresshown and described with respect to any given embodiment are notnecessarily limited to the associated embodiment and may be used orcombined with other embodiments that are shown and described. Further,the claims are not intended to be limited by any one example embodiment.For example, one or more of the operations of the methods may besubstituted for or combined with one or more operations of the methods.

The foregoing method descriptions and the process flow diagrams areprovided merely as illustrative examples and are not intended to requireor imply that the operations of various embodiments may be performed inthe order presented. As will be appreciated by one of skill in the artthe order of operations in the foregoing embodiments may be performed inany order. Words such as “thereafter,” “then,” “next,” etc. are notintended to limit the order of the operations; these words are used toguide the reader through the description of the methods. Further, anyreference to claim elements in the singular, for example, using thearticles “a,” “an,” or “the” is not to be construed as limiting theelement to the singular.

Various illustrative logical blocks, functional components,functionality components, circuits, and algorithm operations describedin connection with the embodiments disclosed herein may be implementedas electronic hardware, computer software, or combinations of both. Toclearly illustrate this interchangeability of hardware and software,various illustrative components, blocks, functional components,circuits, and operations have been described above generally in terms oftheir functionality. Whether such functionality is implemented ashardware or software depends upon the particular application and designconstraints imposed on the overall system. Skilled artisans mayimplement the described functionality in varying ways for eachparticular application, but such embodiment decisions should not beinterpreted as causing a departure from the scope of the claims.

The hardware used to implement the various illustrative logics, logicalblocks, functional components, and circuits described in connection withthe embodiments disclosed herein may be implemented or performed with ageneral purpose processor, a digital signal processor (DSP), anapplication-specific integrated circuit (ASIC), a field programmablegate array (FPGA) or other programmable logic device, discrete gate ortransistor logic, discrete hardware components, or any combinationthereof designed to perform the functions described herein. Ageneral-purpose processor may be a microprocessor, but, in thealternative, the processor may be any conventional processor,controller, microcontroller, or state machine. A processor may also beimplemented as a combination of computing devices, e.g., a combinationof a DSP and a microprocessor, a plurality of microprocessors, one ormore microprocessors in conjunction with a DSP core, or any other suchconfiguration. Alternatively, some operations or methods may beperformed by circuitry that is specific to a given function.

In one or more embodiments, the functions described may be implementedin hardware, software, firmware, or any combination thereof. Ifimplemented in software, the functions may be stored as one or moreinstructions or code on a non-transitory computer-readable medium or anon-transitory processor-readable medium. The operations of a method oralgorithm disclosed herein may be embodied in a processor-executablesoftware module that may reside on a non-transitory computer-readable orprocessor-readable storage medium. Non-transitory computer-readable orprocessor-readable storage media may be any storage media that may beaccessed by a computer or a processor. By way of example but notlimitation, such non-transitory computer-readable or processor-readablemedia may include RAM, ROM, EEPROM, FLASH memory, CD-ROM or otheroptical disk storage, magnetic disk storage or other magnetic storagedevices, or any other medium that may be used to store desired programcode in the form of instructions or data structures and that may beaccessed by a computer. Disk and disc, as used herein, includes compactdisc (CD), laser disc, optical disc, digital versatile disc (DVD),floppy disk, and Blu-ray disc where disks usually reproduce datamagnetically, while discs reproduce data optically with lasers.Combinations of the above are also included within the scope ofnon-transitory computer-readable and processor-readable media.Additionally, the operations of a method or algorithm may reside as oneor any combination or set of codes and/or instructions on anon-transitory processor-readable medium and/or computer-readablemedium, which may be incorporated into a computer program product.

The preceding description of the disclosed embodiments is provided toenable any person skilled in the art to make or use the claims. Variousmodifications to these embodiments will be readily apparent to thoseskilled in the art, and the generic principles defined herein may beapplied to other embodiments and implementations without departing fromthe scope of the claims. Thus, the present disclosure is not intended tobe limited to the embodiments and implementations described herein, butis to be accorded the widest scope consistent with the following claimsand the principles and novel features disclosed herein.

What is claimed is:
 1. A method of determining display properties forvirtual content in an environment with a plurality of participants,comprising: capturing, by a processor, an image of the environment;analyzing, by the processor, the captured image to identify an object inthe environment; determining, by the processor, a parameter for theidentified object; receiving, by the processor, an additional parameterfrom at least one other device in the environment; determining, by theprocessor, a location of a digital representation of the virtual contentrelative to the identified object based on the determined parameter andthe received additional parameter; and sending, by the processor, thedetermined location to at least one other device.
 2. The method of claim1, further comprising assigning a priority to the determined parameter,wherein determining the location of the digital representation of thevirtual content relative to the identified object based on thedetermined parameter and the received additional parameter comprisesdetermining the location of the digital representation of the virtualcontent relative to the identified object based on the priority assignedto the determined parameter.
 3. The method of claim 2, whereindetermining the parameter for the identified object comprises:determining at least one or more of a fixed position parameter, a sizeparameter, or a line-of-sight parameter; and determining at least one ormore of a field-of-view parameter, a spacing parameter, an inter-persondistance parameter, a height parameter, and a visibility parameter. 4.The method of claim 3, wherein assigning a priority to the determinedparameter comprises: assigning a first priority to the fixed positionparameter, the size parameter, or the line-of-sight parameter; andassigning a second priority to the field-of-view parameter, the spacingparameter, the inter-person distance parameter, the height parameter, orthe visibility parameter, and wherein the first priority is a higherpriority than the second priority.
 5. The method of claim 1, furthercomprising: identifying the one or more other devices in theenvironment, wherein sending the determined location to at least oneother device comprises sending the determined location to the identifiedone or more other devices.
 6. The method of claim 1, wherein determiningthe location of the digital representation of the virtual contentrelative to the identified object based on the determined parameter andthe received additional parameter comprises: negotiating one or morelocations for rendering the digital representation of the virtualcontent relative to the identified object with at least one other devicein the environment to generate one or more coordinated displayproperties.
 7. The method of claim 6, further comprising using the oneor more coordinated display properties to render the digitalrepresentation of the virtual content so that all co-locatedparticipants physically present in the environment perceive the virtualcontent to be in the same fixed position in the environment.
 8. Themethod of claim 6, further comprising using the one or more coordinateddisplay properties to size the digital representation of the virtualcontent based on a size of a participant physically present in theenvironment.
 9. The method of claim 6, further comprising using the oneor more coordinated display properties to render the digitalrepresentation of the virtual content so that the virtual contentappears to be positioned between a first participant physically presentin the environment and a second participant physically present in theenvironment.
 10. The method of claim 9, wherein using the one or morecoordinated display properties to render the digital representation ofthe virtual content so that the virtual content appears to be positionedbetween the first participant physically present in the environment andthe second participant physically present in the environment comprisesusing the one or more coordinated display properties to render thedigital representation of the virtual content so that the virtualcontent appears to be approximately equidistant to the first participantphysically present in the environment and the second participantphysically present in the environment.
 11. The method of claim 1,further comprising: capturing an updated image of the environment;analyzing the captured updated image to determine whether a number,location, position, or size of the identified object has changed;determining an updated parameter for the identified object in responseto determining that the location, position, or size of the identifiedobject has changed; determining whether a difference between thedetermined parameter and the determined updated parameter exceeds athreshold value; and determining an updated location for the digitalrepresentation of the virtual content relative to the identified objectin response to determining that the difference between the determinedparameter and the determined updated parameter exceeds the thresholdvalue.
 12. The method of claim 1, wherein determining the location ofthe digital representation of the virtual content relative to theidentified object based on the determined parameter and the receivedadditional parameter comprises determining at least one location foreach digital representation of each of a plurality of remoteparticipants.
 13. The method of claim 1, wherein determining theparameter for the identified object comprises determining at least oneor more of: a fixed position parameter; a size parameter; aline-of-sight parameter; a field-of-view parameter; a spacing parameter;an inter-person distance parameter; a height parameter; or a visibilityparameter.
 14. The method of claim 1, wherein the virtual content isrelated to a game.
 15. A computing device, comprising: a memory; and aprocessor coupled to the memory and configured to: capture an image ofan environment; analyze the captured image to identify an object in theenvironment; determine a parameter for the identified object; receive anadditional parameter from at least one other device in the environment;determine a location of a digital representation of virtual contentrelative to the identified object based on the determined parameter andthe received additional parameter; and send the determined location toat least one other device.
 16. The computing device of claim 15, whereinthe processor is configured to: assign a priority to the determinedparameter; and determine the location of the digital representation ofthe virtual content relative to the identified object based on thedetermined parameter and the received additional parameter bydetermining the location of the digital representation of the virtualcontent relative to the identified object based on the priority assignedto the determined parameter.
 17. The computing device of claim 16,wherein the processor is configured to: determine the parameter for theidentified object by: determining at least one or more of a fixedposition parameter, a size parameter, or a line-of-sight parameter; anddetermining at least one or more of a field-of-view parameter, a spacingparameter, an inter-person distance parameter, a height parameter, and avisibility parameter.
 18. The computing device of claim 17, wherein theprocessor is configured to: assign the priority to the determinedparameter by: assigning a first priority to the fixed positionparameter, the size parameter, or the line-of-sight parameter; andassigning a second priority to the field-of-view parameter, the spacingparameter, the inter-person distance parameter, the height parameter, orthe visibility parameter, wherein the first priority is a higherpriority than the second priority.
 19. The computing device of claim 15,wherein the processor is configured to: identify one or more otherdevices in the environment, wherein sending the determined location toat least one other device comprises sending the determined location tothe identified one or more other devices.
 20. The computing device ofclaim 15, wherein the processor is configured to determine the locationof the digital representation of the virtual content relative to theidentified object based on the determined parameter and the receivedadditional parameter comprises negotiating one or more locations forrendering the digital representation of the virtual content relative tothe identified object with at least one other device in the environmentto generate one or more coordinated display properties.
 21. Thecomputing device of claim 20, wherein the processor is configured to usethe one or more coordinated display properties to render the digitalrepresentation of the virtual content so that all co-locatedparticipants physically present in the environment perceive the virtualcontent to be in the same fixed position in the environment.
 22. Thecomputing device of claim 20, wherein the processor is configured to usethe one or more coordinated display properties to size the digitalrepresentation of the virtual content based on a size of a participantphysically present in the environment.
 23. The computing device of claim20, wherein the processor is configured to use the one or morecoordinated display properties to render the digital representation ofthe virtual content so that the virtual content appears to be positionedbetween a first participant physically present in the environment and asecond participant physically present in the environment.
 24. Thecomputing device of claim 15, wherein the processor is configured to:capture an updated image of the environment; analyze the capturedupdated image to determine whether a number, location, position, or sizeof the identified object has changed; determine an updated parameter forthe identified object in response to determining that the location,position, or size of the identified object has changed; determinewhether a difference between the determined parameter and the determinedupdated parameter exceeds a threshold value; and determine an updatedlocation for the digital representation of the virtual content relativeto the identified object in response to determining that the differencebetween the determined parameter and the determined updated parameterexceeds the threshold value.
 25. The computing device of claim 15,wherein the processor is configured to determine the location of thedigital representation of the virtual content relative to the identifiedobject based on the determined parameter and the received additionalparameter by determining at least one location for each digitalrepresentation of each of a plurality of remote participants.
 26. Thecomputing device of claim 15, further comprising: an image sensor; and aprojector configured to project images onto optical lenses, wherein theprocessor is coupled to the image sensor and to the projector.
 27. Thecomputing device of claim 15, wherein the virtual content is related toa game.
 28. A method of determining display properties for virtualcontent in an environment with a plurality of participants, comprising:capturing, by a processor, an image of the environment; analyzing thecaptured image to identify an object in the environment; determining aparameter for the identified object; and determining a location of adigital representation of the virtual content relative to the identifiedobject based on the determined parameter; capturing an updated image ofthe environment; analyzing the captured updated image to determinewhether a number, location, position, or size of the identified objecthas changed; determining an updated parameter for the identified objectin response to determining that the location, position, or size of theidentified object has changed; determining whether a difference betweenthe determined parameter and the determined updated parameter exceeds athreshold value; and determining an updated location for the digitalrepresentation of the virtual content relative to the identified objectin response to determining that the difference between the determinedparameter and the determined updated parameter exceeds the thresholdvalue.
 29. The method of claim 28, further comprising: identifying theone or more other devices in the environment; and sending the determinedlocation to the identified one or more other devices.
 30. The method ofclaim 28, further comprising receiving an additional parameter from atleast one other device in the environment, wherein determining thelocation of the digital representation of the virtual content relativeto the identified object based on the determined parameter comprisesdetermining one or more locations of the digital representation of thevirtual content relative to the identified object based on thedetermined parameter and the received additional parameter.
 31. Themethod of claim 28, wherein determining the location of the digitalrepresentation of the virtual content relative to the identified objectbased on the determined parameter comprises: negotiating one or morelocations for rendering the digital representation of the virtualcontent relative to the identified object with at least one other devicein the environment to generate one or more coordinated displayproperties.
 32. The method of claim 31, further comprising using the oneor more coordinated display properties to render the digitalrepresentation of the virtual content so that all co-locatedparticipants physically present in the environment perceive the virtualcontent to be in the same fixed position in the environment.
 33. Themethod of claim 31, further comprising using the one or more coordinateddisplay properties to size the digital representation of the virtualcontent based on a size of a participant physically present in theenvironment.
 34. The method of claim 31, further comprising using theone or more coordinated display properties to render the digitalrepresentation of the virtual content so that the virtual contentappears to be positioned between a first participant physically presentin the environment and a second participant physically present in theenvironment.
 35. The method of claim 34, wherein using the one or morecoordinated display properties to render the digital representation ofthe virtual content so that the virtual content appears to be positionedbetween the first participant physically present in the environment andthe second participant physically present in the environment comprisesusing the one or more coordinated display properties to render thedigital representation of the virtual content so that the virtualcontent appears to be approximately equidistant to the first participantphysically present in the environment and the second participantphysically present in the environment.
 36. A computing device,comprising: a memory; and a processor coupled to the memory andconfigured to: capture an image of an environment; analyze the capturedimage to identify an object in the environment; determine a parameterfor the identified object; determine a location of a digitalrepresentation of virtual content relative to the identified objectbased on the determined parameter; capture an updated image of theenvironment; analyze the captured updated image to determine whether anumber, location, position, or size of the identified object haschanged; determine an updated parameter for the identified object inresponse to determining that the location, position, or size of theidentified object has changed; determine whether a difference betweenthe determined parameter and the determined updated parameter exceeds athreshold value; and determine an updated location for the digitalrepresentation of the virtual content relative to the identified objectin response to determining that the difference between the determinedparameter and the determined updated parameter exceeds the thresholdvalue.
 37. The computing device of claim 36, wherein the processor isfurther configured to: identify the one or more other devices in theenvironment; and send the determined location to the identified one ormore other devices.
 38. The computing device of claim 36, wherein theprocessor is further configured to: receive an additional parameter fromat least one other device in the environment; and determine the locationof the digital representation of the virtual content relative to theidentified object based on the determined parameter by determining oneor more locations of the digital representation of the virtual contentrelative to the identified object based on the determined parameter andthe received additional parameter.
 39. The computing device of claim 36,wherein the processor is further configured to determine the location ofthe digital representation of the virtual content relative to theidentified object based on the determined parameter by negotiating oneor more locations for rendering the digital representation of thevirtual content relative to the identified object with at least oneother device in the environment to generate one or more coordinateddisplay properties.
 40. The computing device of claim 39, wherein theprocessor is further configured to use the one or more coordinateddisplay properties to render the digital representation of the virtualcontent so that all co-located participants physically present in theenvironment perceive the virtual content to be in the same fixedposition in the environment.
 41. The computing device of claim 39,wherein the processor is further configured to use the one or morecoordinated display properties to size the digital representation of thevirtual content based on a size of a participant physically present inthe environment.
 42. The computing device of claim 39, wherein theprocessor is further configured to use the one or more coordinateddisplay properties to render the digital representation of the virtualcontent so that the virtual content appears to be positioned between afirst participant physically present in the environment and a secondparticipant physically present in the environment.
 43. The computingdevice of claim 42, wherein the processor is further configured to usethe one or more coordinated display properties to render the digitalrepresentation of the virtual content so that the virtual contentappears to be positioned between the first participant physicallypresent in the environment and the second participant physically presentin the environment by using the one or more coordinated displayproperties to render the digital representation of the virtual contentso that the virtual content appears to be approximately equidistant tothe first participant physically present in the environment and thesecond participant physically present in the environment.